Form-cylinder for printing-machines



(No Model.) J. 0. FORD.

FORM CYLINDER FOR PRINTING MACHINES.

Patented May 14, 1889.

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' UNITED STATES PATENT OFFICE.

JOHN 0. FORD, OF BEVERLY, MISSOURI, ASSIGNOR TO IVILLIAM REES & 00., OF KEOKUK, IOWVA.

FORM-CYLINDER FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 403,423, dated May 14, 1889.

Application filed Aprillfi, 1887. $erial No. 235,098. (No model.)

To all whom it may concern.-

Be it known that I, JOHN 0. FORD, of Beverly, in the county of Macon and State of Missouri, have invented a certain new and useful Improvement in Form-Cylinders for Printing- Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to acylinder for printing-presses; and my improvement consists in certain features of construction, hereinafter described, and pointed out in the claims.

Figure I is an end view of the form-cylinder. Fig. II is a transverse section of the form-cylinder at II II, Fig. III. Fig. III is a side view of the form-cylinder. Fig. IV is a longitudinal section of the form-cylinder at IV IV, Fig. I. Fig. V is a perspective view of one of the hooks by which the forms are held in place. Fig. VI is a perspective view of a piece of furniture which is used as a distance-piece between two of the hooks in the absence of a form.

4 is my form-cylinder, which may be cast of iron or steel. It has anumber of dovetail channels, 18, extending longitudinally from one end to near the other end. In these grooves are steel hook-blocks, whose bases 19 fit snugly in the channels, while their hooked parts 20 are fitted to engage the edges of printing-forms 21 and lock them in posit-ion upon the cylinder. The hook at each end of the channels is made with a single hook, 20, while the intermediate hook-blocks are made with a hookupon each end to engage two forms. The bases of the hook-blocks are undercut or beveled at the ends to engage the beveled ends of the furniture-blocks 22, which are inserted as distance-pieces between two of the hook-blocks when it is not required to place forms between them. The open ends of the channels 18 are stopped by screw-studs 23, which form abutments for the outer hookblocks at that end of the cylinder. The opposite ends 24 of the channels are bored through longitudinally to receive the shanks of screws 25, whose screw-threaded parts work in screw-sockets of the outer screw-blocks at that end of the cylinder, one of said outer blocks being shown in Fig. V. The screws have collars 26, which bear against the channel ends or abutments 24. The screws have squared ends 27, to which a key or wrench may be applied to turn the screws to tighten the hooks on the forms or to loosen the hooks from engagement with the forms.

I claim as my invention 1. The combination of the cylinder formed with longitudinal undercut channels, the hook-blocks fitting the channels having their bases undercut at the ends, and the furnitureblocks occupying the channels having their ends overeut to fit the ends of the bases.

2. The combination of the printing-forms, the cylinder formed with longitudinal undercut channels extending from one end to near the other end, the hook-blocks fitting the channels, the screw-studs forming abutments at the open ends of the channels, the screws working in end blocks, each screw being formed with a shank having a squared end and a collar.

JOHN C. FORD.

Witnesses:

CHAS. H. BAGBY, O. H. URMsToN. 

